It might not be a bad idea for someone with a known good copy to post the MD5 checksum.
I use hashcalc for this sort of thing, it's fast, free, and simple to use. It might be overkill, but sometimes you just have to be sure.
Here's what I have from the file I downloaded a while back. Not sure if it's useful, but here it is in case. I've attached it for comparison.
Zip name = DS1000_D,E_Upd_v2_02_02.zip
DS1000DUpdate.RGL MD5 = 16d645a8ac4b9cf0d5b11cc3e3a62536
CRC32 = cd27dd67
DS1000EUpdate.RGL MD5 = 272086b2037231c62446617436544a77
CRC32 = a3370f0e
Hope that helps.
Edit: Just a grammar error.